Prostitutes sit at an outdoor table February 21, 2001 in Peas Coloradas, Colombia.

Three Secret Service agents implicated in the prostitution scandal in Colombia would be leaving their posts, the agency announced Wednesday.

Agents, as well as military personnel, are alleged to have hired prostitutes in advance of President Barack Obama's recent trip to Cartagena to attend a summit of Latin American leaders.

CBS reported late today that two of the men removed from their positions were both supvervisors: David Chaney, who was allowed to retired, and Greg Stokes of the Canine Tranining Section, who was "removed with cause" and may appeal his dismissal.

A third employee, who was not a supervisor, has also resigned. Eight other Secret Service personnel members remain under investigation. According to Reuters, Congressmen Darrell Issa and Elijah Cummings, the two top members of the House Oversight Committee, said that additional dismissals and resignations were likely in the coming days.

Meanwhile, separate investigations — including by the Pentagon — were under way, while investigators from the Secret Service's Office of Professional Responsibility were dispatched to Cartagena to interview witnesses.

The scandal erupted after 11 agents and at least 10 military service members allegedly brought as many 21 prostitutes to a hotel in Cartagena early the morning of April 12, after a night of drinking at a strip club.

A day after the dispute, the 11 Secret Service agents allegedly involved were summoned home by Washington and placed on administrative leave. On Monday they lost their security clearances.

"These are the first steps," the AP quoted Rep. Pete King, R-N.Y., chairman of the House Homeland Security Committee, which oversees the Secret Service, as saying.